Our Nail Care Lamps Are Carefully Blended From Abs. Designed To Help Improve The Rough Appearance Of The Nail Surface. The Use Method Is Very Convenient: 1. The Lamp Holder Can Freely Adjust The Height And Angle According To The Size Of The Hand, Which Is Convenient To Use. 2. Please Use The Dc 5V/2A Adapter To Connect The Usb Cable To The Power Source To Light Up The Light. 3. Soak And Clean The Affected Feet, Then Trim The Toenails And Turn On The Instrument To Start The Care. 4. Press The Timing Button To Select A Lighting Time Of 30 Seconds, 60 Seconds Or 99 Seconds, Set As Needed. 5. After Pressing The Timing Button, The Uv Light Will Automatically Light Up And Turn Off Automatically After The Timing Ends. 6. If You Need To Pause The Work Halfway, Please Press The Corresponding Timing Button Again To Pause The Lighting. 7. If The Time Is Not Set, When The Hand Reaches Into The Device, The Ultraviolet Lamp Will Automatically Light Up And Automatically Turn Off After About 99 Seconds Of Continuous Irradiation. And Adjustable Lights On Both Sides To Adapt To Different Handssize, Three-Speed Timing Automatically Starts And Stops To Avoid Overexposure.